> For the complete documentation index, see [llms.txt](https://kinematicsoup.gitbook.io/reactor/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kinematicsoup.gitbook.io/reactor/api-reference/ks.reactor/ks.reactor.ksplayerapi/ks.reactor.ksplayerapi.logincallback.md).

# Delegate ksPlayerAPI.LoginCallback

Namespace: [KS.Reactor](/reactor/api-reference/ks.reactor.md)\
Assembly: KSCommon.dll

Callback for all login requests.

```csharp
public delegate void ksPlayerAPI.LoginCallback(string error, ksPlayerAPI.Session session, object asyncState)
```

#### Parameters

`error` [string](https://learn.microsoft.com/dotnet/api/system.string)

Error message.

`session` [ksPlayerAPI](/reactor/api-reference/ks.reactor/ks.reactor.ksplayerapi.md).[Session](/reactor/api-reference/ks.reactor/ks.reactor.ksplayerapi/ks.reactor.ksplayerapi.session.md)

Session created on a successful login.

`asyncState` [object](https://learn.microsoft.com/dotnet/api/system.object)

Asynchronous state object.